Building openconnect 5.01 on Mac OS X 10.5 Leopard fails as follows: libtool: link: /usr/bin/gcc-4.2 -dynamiclib -Wl,-undefined -Wl,dynamic_lookup -o .libs/libopenconnect.2.dylib .libs/libopenconnect_la-version.o .libs/libopenconnect_la-ssl.o .libs/libopenconnect_la-http.o .libs/libopenconnect_la-auth.o .libs/libopenconnect_la-library.o .libs/libopenconnect_la-compat.o .libs/libopenconnect_la-gnutls.o .libs/libopenconnect_la-gnutls_pkcs12.o .libs/libopenconnect_la-gnutls_tpm.o -L/Volumes/Data/macports/leopard/lib /Volumes/Data/macports/leopard/lib/libgnutls.dylib /Volumes/Data/macports/leopard/lib/libxml2.dylib -lpthread -lz /Volumes/Data/macports/leopard/lib/liblzma.dylib /Volumes/Data/macports/leopard/lib/libiconv.dylib -lm -lproxy /Volumes/Data/macports/leopard/lib/libp11-kit.dylib /Volumes/Data/macports/leopard/lib/libintl.dylib -Os -arch ppc -Wl,--version-script -Wl,libopenconnect.map -Wl,-headerpad_max_install_names -arch ppc -pthread -install_name /Volumes/Data/macports/leopard/lib/libopenconnect.2.dylib -compatibility_version 5 -current_version 5.0 -Wl,-single_module ld: unknown option: --version-script collect2: ld returned 1 exit status